package com.heima.interceptor;

import com.alibaba.fastjson.JSONObject;
import com.heima.pojo.Result;
import com.heima.utils.JwtUtils;
import org.springframework.stereotype.Component;
import org.springframework.util.StringUtils;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@Component
public class LoginCheckInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        String token = request.getHeader("token");
        String url = request.getRequestURL().toString();
        if (url.contains("login")){
            return true;
        }
        if (!StringUtils.hasLength(token)){
            Result error = Result.error("NOT_LOGIN");
            String s = JSONObject.toJSONString(error);
            response.setContentType("text/json;charset=utf-8");
            response.getWriter().write(s);
            return false;
        }
        try {
            JwtUtils.parseJWT(token);
        } catch (Exception e) {
            Result error = Result.error("NOT_LOGIN");
            String s = JSONObject.toJSONString(error);
            response.setContentType("text/json;charset=utf-8");
            response.getWriter().write(s);
            return false;
        }
        return true;
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        HandlerInterceptor.super.postHandle(request, response, handler, modelAndView);
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        HandlerInterceptor.super.afterCompletion(request, response, handler, ex);
    }
}
